WASHINGTON » An ex-convict denied bond on a murder charge Friday had help from others holding a family captive inside their mansion for at least 18 hours, authorities said, and their investigation is continuing.

During their ordeal, the business executive and his wife told others to stay away — even ordering a pizza deliverer to leave two pies at the door — as they frantically arranged for $40,000 in cash to be dropped off at the home.

But once four neat stacks of $100 bills were left on the seat of a red sports car in the family’s garage, Daron Dylon Wint brutally struck and stabbed Savvas Savopoulos, the CEO of the American Iron Works company where he had once worked as a welder, Wint’s charging document said.

Savopoulos’s wife Amy, their 10-year-old son Philip and their housekeeper Veralicia Figueroa also were killed, and then the house was set on fire with matches and a flammable liquid.

The fire began on the queen-sized mattress where the boy’s body was stabbed and burned, authorities said.

Firefighters found the adults’ bodies in the next room. Evidence shows the women suffered "blunt force and sharp force trauma" before the $4.5 million mansion was set on fire.

Authorities linked what may have been two different men to Amy Savopoulos’ blue Porsche 911 the day of the killings. One, "with short, well-groomed hair," was spotted driving erratically away from the crime scene. Another, wearing a dark hoodie, was videotaped carrying a bucket near where the Porsche was set on fire later that day.

The pizza gave Wint away. His DNA was found on the crust of a partially-eaten slice of pepperoni, one of two pizzas ordered by Amy Savopoulos the night of May 13 while the group was "being held against their will," an affidavit said.

A woman believed to be Amy Savopoulos paid for the pizzas by credit card and told the delivery person to leave the food on the porch, because she was "nursing her sick child" and would not come to the door, the document says.

Wint, who was tracked down by U.S. Marshals and arrested Thursday night with two other men and three women, appeared in a white jump suit in court Friday.

A court document said authorities believe the killings "required the presence and assistance of more than one person." None of the people detained with Wint were immediately charged with any crimes.

Wint is being represented by Natalie Lawson, a public defender. His defense argued that authorities lack probable cause, since a suspect seen driving the Porsche had short hair. Wanted posters issued while Wint was a fugitive showed him with long hair.

D.C. Superior Court Judge Erroll Arthur agreed with Assistant U.S. Attorney Emily Miller to deny bail, noting that Wint was arrested with some of the missing money, and that the DNA from the pizza ties him to the slayings.

U.S. marshals and police had tracked Wint to New York and back before dozens of officers swarmed a car and truck in the nation’s capital, arresting the whole group without a fight.

"We had overwhelming numbers and force," Robert Fernandez, commander of the U.S. Marshal Service’s Capital Area Regional Fugitive Task Force, told The Associated Press on Friday. "They completely submitted immediately."

"I don’t think they knew we were tailing them until the moment we swarmed in on them," said Fernandez.

The truck, which belongs to Amerit Fleet Solutions, is a rolling garage equipped to service vehicles away from fixed locations. Spokeswoman Karen Vinton said the California-based company is cooperating with authorities.

Wint’s record was cited as a reason for denying him bond. He was arrested three times for assault in 2006 and 2007, serving a 10-month sentence in New York, and then convicted of assaulting a girlfriend in Maryland in 2009.

In 2010, he pleaded guilty to malicious destruction of property after he allegedly broke into a woman’s apartment, stole a television, vandalized her car and threatened to kill her infant daughter. Also in 2010, Wint was arrested carrying a 2-foot-long machete and a BB pistol outside the American Iron Works headquarters, but weapons charges were dropped after he pleaded guilty to possessing an open container of alcohol.

"Though Mr. Wint is now incarcerated and he’s held without bond, our work is not done," acting District of Columbia U.S. Attorney Vincent Cohen said outside the courthouse. "We intend to unseal additional search warrants in the coming days."

Contributors include Brian Witte, Alex Brandon, Sarah Brumfield and Ben Nuckols in Washington; Meredith Somers in Upper Marlboro, Maryland; Colleen Long in New York City and Carolyn Thompson in Buffalo, New York.